<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
			<select name="" id="per" onchange="even()" >
				<option value="">请选择网站</option>
				<option value="http://www.baidu.com">百度</option>
				<option value="http://www.taobao.com">淘宝</option>
				<option value="http://www.163.com">网易</option>
			</select>
		</body>
		<script type="text/javascript">
			function even(){
				var sg=document.getElementById('per').value;
				location.href=sg;
			}
		</script>
</html>
